1、TNS连接错误
同事跟我说连接oracle数据库报错ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务，如下所示：
2、查看本地TNSPING
查看本地的tns配置：
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WXX = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.58)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl) ) ) |
查看本地的tnsping是ok的
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C:\Users\Administrator>tnsping WXX TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 26-10月-2016 11:31:04 Copyright (c) 1997, 2010, Oracle. All rights reserved. 已使用的参数文件: D:\app\Administrator\product\11.2.0\client_2\network\admin\sqlnet.ora 已使用 TNSNAMES 适配器来解析别名 尝试连接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.58)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl))) OK (30 毫秒) C:\Users\Administrator> |
本地的tnsping暂时看来是正常的，是ok的。
3、查看网络连接
telnet 192.168.121.58 1521，也是能进去的，证明网络ok
oracle服务器的iptables也是关闭的
文章来源地址：http://blog.csdn.net/mchdba/article/details/52949382，博主mchdba（黄杉）谢绝转载。
4、查看服务器的lsnrctl服务
去服务器看lsnrctl状态：
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[[email protected] admin]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 26-OCT-2016 11:33:32 Copyright (c) 1991, 2009, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 26-OCT-2016 11:09:33 Uptime 0 days 0 hr. 23 min. 59 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /usr/oracle/app/diag/tnslsnr/iZ23vluqpmmZ/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.121.58)(PORT=1521))) The listener supports no services The command completed successfully [[email protected] admin]$ |
看到no services，也就是说lsnrctl监听服务启动起来，没有任何oracle实例的，所以问题就来了，没有oracle实例，客户端通过lsnrctl监听的话，就连接不到实例信息。所以这里我们需要添加实例信息，添加实例信息，就在listener.ora配置文件里面。
5、在listener.ora里面添加实例信息
完善listener.ora配置：
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[[email protected] admin]$ cp listener.ora z_listener.ora.bak [[email protected] admin]$ vim listener.ora [[email protected] admin]$ [[email protected] admin]$ more listener.ora # listener.ora Network Configuration File: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora # Generated by Oracle configuration tools. LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.121.58)(PORT = 1521)) ) ) # 下面就是添加的新实例信息 SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = orcl) (SID_NAME = orcl) ) ) ADR_BASE_LISTENER = /usr/oracle/app [[email protected] admin]$ |
设置完后，重启监听lsnrctl服务，可以看到会有一个instance服务启动起来了：
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[[email protected] admin]$ lsnrctl stop LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 26-OCT-2016 11:38:29 Copyright (c) 1991, 2009, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) The command completed successfully [[email protected] admin]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 26-OCT-2016 11:38:33 Copyright (c) 1991, 2009, Oracle. All rights reserved. Starting /usr/oracle/app/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.1.0 - Production System parameter file is /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /usr/oracle/app/diag/tnslsnr/iZ23vluqpmmZ/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.75.58)(PORT=1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 26-OCT-2016 11:38:33 Uptime 0 days 0 hr. 1 min. 3 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /usr/oracle/app/diag/tnslsnr/iZ23vluqpmmZ/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.75.58)(PORT=1521))) Services Summary... Service "orcl" has 1 instance(s). Instance "orcl", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully [[email protected] admin]$ |
OK，在问下同事，同事说能连接上了，问题解决。